BUG: unable to handle kernel paging request at fffffffffffffff4 PGD 926d067 P4D 926d067 PUD 926f067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 16027 Comm: syz-executor2 Not tainted 4.19.0-rc8-next-20181019+ #98 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:parse_monolithic_mount_data fs/namespace.c:2369 [inline] RIP: 0010:do_remount fs/namespace.c:2402 [inline] RIP: 0010:do_mount+0xb98/0x1d90 fs/namespace.c:2965 Code: 06 00 48 89 c2 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8a 11 00 00 48 b8 00 00 00 00 00 fc ff df <4c> 8b 33 49 8d 7e 18 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 11 RSP: 0018:ffff8801817e7c28 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: ffffc90005e8a000 RDX: 1ffffffffffffffe RSI: ffffffff81e011ec RDI: 0000000000000282 RBP: ffff8801817e7db0 R08: ffff8801bd448700 R09: ffffed003b5c5b4f R10: ffffed003b5c5b4f R11: ffff8801dae2da7b R12: ffff8801cd602430 R13: ffff8801bfc3a2c0 R14: ffff8801bfc3a2c0 R15: ffff8801cccb0240 FS: 00007fae0c091700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff4 CR3: 00000001b8d19000 CR4: 00000000001406f0 Call Trace: kobject: 'loop1' (0000000004794934): kobject_uevent_env kobject: 'loop1' (0000000004794934): fill_kobj_path: path = '/devices/virtual/block/loop1' ksys_mount+0x12d/0x140 fs/namespace.c:3190 __do_sys_mount fs/namespace.c:3204 [inline] __se_sys_mount fs/namespace.c:3201 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3201 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fae0c090c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fae0c090c90 RCX: 0000000000457569 RDX: 0000000020000080 RSI: 0000000020000180 RDI: 0000000020000ac0 RBP: 000000000072bf00 R08: 0000000020000480 R09: 0000000000000000 R10: 0000000000100021 R11: 0000000000000246 R12: 00007fae0c0916d4 R13: 00000000004c289b R14: 00000000004d3c78 R15: 0000000000000004 Modules linked in: CR2: fffffffffffffff4 ---[ end trace 7b2641c60d083e83 ]--- RIP: 0010:parse_monolithic_mount_data fs/namespace.c:2369 [inline] RIP: 0010:do_remount fs/namespace.c:2402 [inline] RIP: 0010:do_mount+0xb98/0x1d90 fs/namespace.c:2965 Code: 06 00 48 89 c2 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8a 11 00 00 48 b8 00 00 00 00 00 fc ff df <4c> 8b 33 49 8d 7e 18 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5e 11 RSP: 0018:ffff8801817e7c28 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: fffffffffffffff4 RCX: ffffc90005e8a000 RDX: 1ffffffffffffffe RSI: ffffffff81e011ec RDI: 0000000000000282 RBP: ffff8801817e7db0 R08: ffff8801bd448700 R09: ffffed003b5c5b4f R10: ffffed003b5c5b4f R11: ffff8801dae2da7b R12: ffff8801cd602430 R13: ffff8801bfc3a2c0 R14: ffff8801bfc3a2c0 R15: ffff8801cccb0240 FS: 00007fae0c091700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff4 CR3: 00000001b8d19000 CR4: 00000000001406f0